Room Pressure
Monitor/Alarm System
The cost-effective solution to monitoring
negative or positive room air pressure
continuously and accurately
SARS and the need for Emergency Preparedness have dramatically
increased the number of negative pressure rooms required
Serving the Medical Community for over 40 Years
PEACE MEDICAL, INC. ■ ROOM PRESSURE MONITOR / ALARM SYSTEM
NEW SYSTEM CAPABILITIES INSIDE
What is a Room Pressure Monitor/Alarm?
A Room Pressure Monitor/Alarm provides continual, accurate indication of positive or negative pressure in rooms
where pressure maintenance is critical. When improper
pressure or reversal of flow occurs, an audible and visible
alarm is triggered to communicate the hazard. The visual
portion of the alarm utilizes universal color coded displays
to enable untrained personnel to properly respond to the
indicated alarm status.
Why do you need them?
Hospitals and laboratories have long used pressure differentials between rooms (the flow of air from one room to
another) as a method of protecting patients and staff from
potentially dangerous chemicals and infectious pathogens.
While this is an effective technique, it is often difficult to
set up and maintain. The every day influences of building
draft, temperature and filter loading cause these pressure
differentials to fluctuate, and flow reversals to occur.
Unintentional hazard conditions are thus created. Therefore,
an effective monitoring system must be implemented to
alert hospital/laboratory staff.
Room Pressure
Monitor/Alarm System
The RAM-2350 and RAM-2350-DKS Room Pressure
Monitor/Alarm Systems provide a continuous, accurate
indication of negative or positive airflow in areas
where pressure differential is required. Pressure is
read through a patented unidirectional check valve
containing a mechanical seal that prevents the migration
of contaminants into or out of the referenced area.
This design eliminates flow reversal problems common
to many other types of room pressure devices. Flow
reversal can occur for a variety of reasons, turning a
negative pressure room into a positive pressure room.
The RAM unit will alarm when this situation occurs.
Most devices on the market simply sense flow, they
will not alarm when flow reversal occurs. This creates
an extremely hazardous condition that will not be
noticed until physical verification is performed.
Are they cost-effective?
The appearance of SARS, tuberculosis and preparing for
potential biological attacks have dramatically increased
the number of negative pressure infectious isolation rooms
hospitals must create and monitor. OSHA regulations
dictate that rooms where potentially infectious patients
are hospitalized, treated or receive cough-inducing procedures, must be checked for negative pressure on a daily
basis. This can be accomplished by means of smoke tubes
or air pressure sensing devices.
Experienced test and balance contractors estimate smoke
tube testing takes an average of 15 minutes per room, per
day. If hospital maintenance staff are used to perform these
tests, the costs can exceed $3000 per room, per year, and
much more if an outside contractor is hired. When you
factor in the cost of purchasing large quantities of smoke
tubes, the cost rises further.
“Real Time” continuous Room Pressure Monitors need
only be verified once a month according to CDC guidelines. The Monitors will pay for themselves in a matter of
months while greatly reducing testing manhours, supply
expenses, and the related OSHA paperwork.
Room Pressure Monitor/Alarms Feature:
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Measurement of dynamic pressure differential
Adjustable time delay to allow for opening of doors
Green, Yellow and Red universal status display
Audible alarm with mute and automatic reset
Pressure check valve that assures an alarm will sound
if flow reversals occur
Industrial quality for long term, low maintenance
Low temperature sensors eliminate possible fire risk
Remote alarm signal contact
Analog contact to interface with building automation
computers
Easy installation and calibration with complete
engineering support
Two year warranty
Meets OSHA, ANSI and ASHRAE requirements
Typical Applications
Negative Rooms: Patient Isolation Rooms, Bronchoscopy
Suites, Autopsy Rooms, Hospital Laboratories.
Positive Rooms: Operating Suites, Protective Patient
Isolation Rooms, Radiology, Catheterization Labs.
RAM-2350
RAM-2350-DKS
Room Alert Monitors
The RAM Monitors utilize highly visible lighted displays
(green, yellow, red) to indicate room pressure status.
During a hazard condition, the red display lights and
an audible alarm sounds. While the audible alarm may
be manually muted, the red display remains lit until
normal pressure has been restored (audible alarm will
automatically rearm when normal pressure resumes).
The audible alarm has an adjustable time delay (up
to 90 seconds) to allow for staff entry and exit.
The Monitor system is installed through the wall
between the negative pressure room and an adjacent
area (see Diagram 1). The display plate mounts flush
with the wall and is about the size of a normal light
switch The units can be installed and operational in
less than an hour.
The RAM-2350-DKS includes a digital readout which
displays the exact “Real Time” pressure differential in
inches of water column.
Optional Remote Sensors
Both systems are available with Remote Sensors
which are used when the Monitor/Alarm faceplate is
desired at a different location. The Sensor allows
pressure differential readings between the negative
pressure room and an anteroom while condition
status can be viewed at a nursing station,
engineering room, hallway, etc.
SYSTEM FEATURES
Digital Display
The RAM-2350-DKS has a digital
readout in wc to visually monitor
the exact pressure differential and
observe changes.
“Nurse Friendly”
Design
Key Switch Mute allows monitored
room to be used for non-infectious
patients (RAM-2350-DKS ony).
Tamper
Resistant
Construction
All adjustment pots are located
beneath faceplate, avoiding
most tampering.
Room Balance
Pressure
Maintenance
Available circuitry to automatically
adjust supply or return dampers to
maintain desired room pressure.
Computer
Interface
RAMs interface with building
maintenance computer systems.
Custom
Applications
Peace Medical’s engineers can
easily address difficult areas to
monitor. Custom nursing station
panels are also available.
Diagram 1
RAM-2350
Typical Installation
Diagram 2
RAM2350-DKS
Typical Installation
NEW RAM-2350-RAK
Remote Alarm for Nurse’s Station
The 2350-RAK Remote Alarm Kit provides a hard-wire
connection between an individual room monitor and a
remote panel monitor. The panel is typically located at
or nearby a nurse’s station. A visual and audible alarm
will be signalled to the remote station from the corresponding room unit. A key switch is included with the
kit to permanently mute the audible alarm.
Monitor/Alarm Specifications
Power:
Power Consumption:
Room Pressure
Ranges:
Room Pressure
Output:
Accuracy Transducer:
24VAC, 50/60 Hz
6W
Adj. 0-260 FPM (0 to 0.01" wc)
Adj. 0-585 FPM (0 to 0.05" wc)
RAM-2350-DKS: 2-10 VDC, 25mA
(floating ground)
±2% of Span Combined effects
of conformity, hysteresis, dead
band, repeatability
Indicators:
LEDs – Red, Yellow, Green;
LCD Room Pressure Readout
(RAM-2350-DKS only)
Adjustable Setpoints:
Low, Caution and Normal
Remote Alarm
Low room pressure, fail-safe,
Contact:
1 AMP, N.O.
Sensor Only:
RAM-2350-DKS: Intrinsically Safe,
meets UL 913, Class 1 Div. 1,
Group C&D; Option: Corrosion
resistant coating
Sensor:
RAM-2350: Built-in
Sensor Cable Length:
5 feet (RAM-2350-DKS only)
Audible Alarm:
Auto reset horn and LED mute
indication, with up to 90 seconds
adjustable time delay; optional key
switch temporary mute available
Instrument Case:
Flush mount aluminum switch
box, 3"L x 2"W x 2.5"D
Room Wall Depth:
4" to 6" deep or 6" to 10" deep
Standards: ANSI and ACGIH recommended “Real Time” room
pressure measurement, alarming within the recommended
.001" to .002" wc range.
Check Valve
The RAM System utilizes a
patented, unidirectional check
valve that is designed to eliminate problems associated with
hazardous flow reversal common to other systems.
RAM-2350-DKS
“Nurse Friendly” Key Switch Mute
Negative pressure rooms equipped with Monitor/Alarms
are occasionally used for non-infectious patients, where
nurses generally prefer to keep doors open for better
patient care. Pressure changes within the facility will
affect the open room causing the alarm to intermittently
sound. To prevent unwanted alarming, the RAM-2350DKS (only) contains a “Nurse Friendly” Key Switch Mute.
This switch enables the engineering or nursing staff to
mute the system’s audible alarm while a noninfectious
patient occupies the room.
Check Valve Specifications
Body Material:
Check Valve
rial:
Chemical
Resistance:
Ranges:
Carbon steel with epoxy coating
Polyimide disc; temperature range of Mate–269O to 400O C; yield strength of 10,000 psi
Paraformaldehyde gas and ethylene
oxide gas (standard decontamination gas)
0.1" to 0.001" wc normal differential
pressure (RPC-1) 2.0" to 0.1" wc high
differential pressure (RPC-2)
Toll-Free: 800-537-9564 • Fax: 973-672-3404
Email: info@peacemedical.com • Website: www.peacemedical.com
Room Pressure Monitor/Alarm
System Ordering Information
Catalog No.
RAM-2350
RAM-2350-DKS
Room
Balance
Capability
RAM-2350-RAK
Description
Room Alert Monitor – complete with
all components required to install
and operate system
Digital Readout Room Alert Monitor
with alarm mute Key Switch – complete
with all components required to install
and operate system
Related Products Available
From Peace Medical
■ HEPA Filter Negative Pressure Room
Conversion Systems, ceiling or floor
configurations
■ Fume Hood and Biosafety Cabinet
Monitor/Alarms
■ HEPA Filter Infectious “Source Control”
Isolation and Transport Systems
Automatic Damper Control Systems
available to maintain a desired room
pressure differential
Remote Alarm Kit – allows hard-wiring
of RAM-2350-DKS to a remote panel
(i.e. nurse’s station) generating a visual
and audible alarm at that location.
Includes key switch to mute audible
alarm .
Call for more information and ask
about a FREE thirty day Alert
Monitor trial evaluation!
50 South Center Street, Unit 11, Orange, NJ 07050
Tel: 973-672-2120 • Fax: 973-672-3404
TOLL FREE: 800-537-9564
Email: info@peacemedical.com
Website: www.peacemedical.com
We accept American Express, MasterCard & Visa
40
OVER
YEARS OF SERVICE
50 South Center Street, Unit 11
Orange, New Jersey 07050
Many states are mandating continuous
monitoring of negative pressure rooms
and operating suites
Cost-Effective
Room
Pressure
Monitoring
l
Over
Install 5,000
e
Oper d and
Nationating
wide!
PRESORTED
Standard
U.S. Postage Paid
W. Caldwell, NJ
Permit No. 139